[单选题]
A proton strikes an oxygen-1c.k/zab* r;qu8 nucleus pn65c jt+p-d+.jhx w q)z bhvcmvy5 w- +enp97hroducing fluorine-18 and another particle. What other particlenj +j+xv 5tpbyc57 h-ew h d-h6 zm9).wqvcp+n is produced by this nuclear reaction?
A. a neutron
B. an $\alpha$ particle
C. an $b-$ particle
D. an $b+$ particle
